erofs-utils: build: support building static library liberofsfuse

erofs-utils: build: support building static library liberofsfuse

Add new option '--enable-static-fuse' so that we
could import erofsfuse as a static library directly
into other projects

Signed-off-by: ComixHe <heyuming@deepin.org>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/3399126AB01D5AB6+2bad5767fc035a7a2234408b0fffa53b3a07aa51.1717659178.git.heyuming@deepin.org
[ Gao Xiang: the target static library shouldn't have dependencies. ]
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>